Method of brazing steel and copper.



No. 811,954. EATENTED EEEO, 1906.

- J. E. RICHARDSON. METHOD O E yBMZING STEEL AND COPPER.

APPLICATION FILED 00T. 27,1904.

per, of which the following JOHN RICHARDSON, OFPITTSBURG, PENNSYLVANIA.

METHOD oF Bnazme yernia-:L .aan coPPEn.

Specification of Letters Patent. Application filed October 27, 1904:. Serial No. 230,256.

Patented Feb. 6, 19.06.'

To @ZZ whom itmay concern: y

lBe it known that l, JOHN F. RICHARDSON, a citizen of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and' useful lm rovements in Methods of Brazing Steel an Copis a specification, reference being had therem tothe accompanying drawings. p s

. 'llhis invention relates to certain new and useful improvements in methods of brazing steel and copper; and the invention has for its obj ect the provision of novel means whereby a sheet of cop er may be efl'ectually brazed upon a sheet o steel or iron.

With the above object in view reference will be had to the accompanying drawings, forming a part ofthis application, wherein like numerals of reference indicate like partsA throughout the several views, in whichn Figure-1 is a dia rammatical View illus-V trating my improve method of brazin copper and steel. Fig. 2 is a longitudina sectional view u on an enlarged scale, showin the manner 1n which 'the copper is braze upon the steel; and Fig. 3 is a side elevation o the finished article.

To put my invention intopractice, I em-y ploy a furnace the front wall of'which is shown in Fig. 1 of the drawings, and I also employ in connection with this furnace a set of two -high rolls or any other suitable means whereby a plurality of ieces of material may be compressedtoget er sufficiently to force the molecules of one piece into contact with the molecules of the other.

In carrying my invention into effect rthe reference-numeral `1ndicates the front wall of a furnace havingfformed therein a door 2, and reference-numerals 3 and 4 indicate two rolls which I employ for compressing the ma terial to be brazed together. v

Thereference-numeral 5 indicates a piece of steel upon which the cop er is to be brazed, and this piece of steel is llieated to a white heat in the furnace, at which time it is with- Y drawn, and prior to feeding the same through" the rolls at a white heat I s read on the upper surface thereof a suitab e fiuX 6, such as -the igh heat of the ste brass 7 is employed, and upon this another layer of flux 8, such as borax, is'spread, and then the cop er late 9 to be brazed upon the steel is p ace in position, and the steel plate 5, brass sheet 7, and cop er plate 9 are orced through the rolls 3 endl/i, these rolls com ressing the three ieces together, and

n ell fuses the brass and the flux used, and a perfect weld is formed betweenfthe copper plate 9 and the steel plate 5, presentlng an appearance as shown boraX, and then a layer of very thin sheet- I 1n Fig. 3, the sheet of brass which was used l being invisible, owing to the same bein a very thin sheet and becoming fused w en placed in contact with the white-heated steel plate 5.

Whatllclaim is- 1. A method` of brazing steel and copper, consisting of heating a piece of steel .to a white heat, then spreading a flux over'v the surface of the steel, then laying a thin sheet of brass substantially coextensive with the steel thereon and again spreading a suitable .flux upon the surface of the brass and then laying the iece of copper which is to` be welded to t e steel upon the flux and brass, and then `submitting the same to suitable rolls or a compressor whereby the three sheets of material are compressed, substantially as described.

2. A method of brazing steel and copper, consisting of heating a piece of steel to a white heat and spreading a flux upon its one surface, then applyin a thin sheet of brass of an 'area equa this. surface'and again spreading a fiux upon the brass, to be'brazed" to the steel upon the sheet of brass and flux and submitting the same to a compressing means whereby they are forced to t at of said surface to' and thenl placing a piece of copper into engagement with each other under pressure. Y

3. The method of forming a composite sheet of steel and copper consisting in heating' a sheet of steel, applying a 'flux to said sheet while the sheet. is 1n heated condition, then layin a sheet of brass upon the sheet of steel, then aying a sheet of cop er upon said sheet of brass and melting the slieet of brass by the 'loo initial heet of seid sheet of steel, end then als together by presente IWhile the steel re.

While the'bessi in melma Cdil IQDl ti 'a Pfiff: 0f lts'intial heat. 1o

ressing the composite sheet. Y In testimony whereof I ax my signature 4..The method of brazjng steel en@ Qoll: 1n the presence O two Wit esses. f consist' of'he'tting"the"Stal, lo'lng a.' 11X y 'l JOHN FXICHARDSON upon sai steel, then plafeingbljass nFon sgairdl "Witnesses: steel, and lastly plamg 'al sheet o' ',''lper POTTER,

upon said brass, en@ then Weldingl seiyd met LAWSON. 

